Improvement in rotary engines



3 Sheets--Sheet I.

T. E.- STUART. Rotary-Engines.

10,154,929; Patented Sep t.8,1874.

WITNESSES j I INVENYTOR w y mt Pi M Attorneys 3Sheevts--Shegt2. T. E.STUART.

. Rotary-Engines. N0,l5 4,929. V v Patented Sept.8,1874.

WITNESS ES I INVZTBTOW Y 4 M V Attorneys UNITED STATES PATENT omct.

TIMOTHY E. STUART, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 154,929, datedSeptember 8, 1874;" application filed August 12, 1874.

To all whom it may concern:

Be it known that I, TIMOTHY E. STUART, of Boston, in the county ofSuffolk and in the State of Massachusetts, have invented certain new anduseful Improvements in Rotary En-v gines; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangementof a rotary engine, as will be hereinafter more fully set forth. 1-

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawings, in which-Figure 1 is a side elevation of my rotary engine, the journal-box beingin longitudinal section. Fig. 2 is a longitudinal vertical section ofthe same through the line av as, Fig. 1. Fig. 3 is a transverse verticalsection through the line y 3 Fig. 2. Fig.4 is a perspective view of apacking-ring used in the engine.

A represents a base of any suitable construction, in which is securedthe circular casing B. Through the center of this casing passes a shaft,0, which is supported on each side of the casing in a journal-box, D.Each box rests in a stand, E, and is adjusted laterally therein by meansof set-screws b 1), upon which are jam-nuts a a, to set the screws andhold them as desired. The stand E is adjustable up and down on verticalbolts 01 d, rising from the base A, and nuts 6 e, screwed on the upperends of said bolts to hold the stand down when adjusted. The stand isadjusted by means of set-screws h h, passing through the stand andbearing against the base. On the screws h h are jam-nuts i t, asshown-in Fig. 1.

By the up-and-down adjustment of the stands E, and the lateraladjustment-of the boxes D, the shaft 0 with its piston may be adjustedas desired, to compensate for any Wear of the parts.

On the center shaft 0, within the casing B, are secured two eccentricpistons, G G, constructed in the form shown in Fig. 3, and set inopposite directions. These pistons work in separate channels B B in thecasing B, said channels being formed by means of a central annularpartition, B in the same. The point of each piston which comes incontact with the inner circumference of the casing is provided with across-bar, f, of flint, pressed outward by means of springs or. In bothsides of each piston are inserted rings made of flint or equivalent hardsubstance, m m, which rub against metal rings at n in the heads of thecasing and in the partition B These metal rings are constructed as shownin Fig. 4, the

ends overlapping each other, and springs y are arranged to press therings against the pistons, and also to spread them as much as possiblein the annular grooves in which they are inserted. H represents thesteam-chest,

divided by a partition in two chambers, in

each of which is a valve, I. Thesevalves are constructed as shown inFig.3, and turn in semicircular seats 2. The head of the valve extendsthrough an aperture into the chamber B, and rests on the piston G, theend of thevalve being lined with flint to prevent wear. The head of thevalve is provided with a passage, 0, to correspond with thesteam-entrance J. Each valve is pressed down by means of a spring, 8, ofany suitable construction; but, in place of such springs, the

steam may be made to pass over the valves and hold them down. Back ofthe point f in each piston is a recess, t, to form the abut ment againstwhich the steam is to work. K is the exhaust, and o 'u are drain-cocksin the bottom of each channel in the casing.

The steam, entering into one of the compartments of the steam-chest H,passes through the passage 1) of its valve I into the correspondingchannel B and strikes against the abutment h of that piston, forcing thesame around until the swell to on said piston lifts the valve far enoughto shut off the'steam, whenit commences to exhaust. The pistons beingset in opposite directions, the steam will be let into one channel atthe same time as it is shut off from the other.

Having thus fully described my invention, what I claim as new, anddesire tosecure by Letters Patent, is-

tons G, with L-shaped abutments tand crossbar f, steam-chest H, valvesI, with passages 10, and springs s, all substantially as and for thepurposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this12th day of August, 1874.

TIMOTHY E. STUART.

Witnesses:

H. A. HALL, J. M. MASON.

